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It Is Not Always Good to Be Large; Some Female Fitness Components in a Temperate Digger Wasp, Bembix rostrata (Hymenoptera: Sphecidae)

Folke K. Larsson and Jan Tengö
Journal of the Kansas Entomological Society
Vol. 62, No. 4 (Oct., 1989), pp. 490-495
Stable URL: http://www.jstor.org/stable/25085125
Page Count: 6
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It Is Not Always Good to Be Large; Some Female Fitness Components in a Temperate Digger Wasp, Bembix rostrata (Hymenoptera: Sphecidae)
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Abstract

The hypothesis of fecundity advantages for large females was tested in one of the northernmost populations of the digger wasp Bembix rostrata during a 4 year study in Sweden. In this K-selected species, females normally produce a maximum of four to five unicellular nests during their lifetime. In 2 out of 4 years, larger females needed longer time to complete a nest than smaller females. In addition, larger females were not found to live longer than smaller females, indicating that female body size in some years is negatively correlated with fecundity.

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